10 questions
Why is a light bulb warm after it has been on for a few hours?
It has produced light energy.
It has produced mechanical energy.
It has produced thermal (heat) energy).
It has produced potential energy.
What is the law of conservation of energy?
Energy can be destroyed and created.
Objects in motion stay in motion until a force is apllied.
Energy cannot be created or destroyed, it can only change form.
Energy can be stored in an object.
A light bulb can produce light and thermal energy.
True
False
Potential energy can be converted into kinetic energy.
True
False
An object in motion does not change positiion.
True
False
Energy is required to stop an object in motion.
True
False
As a pencil falls off a desk, its potential energy is being changed to kinetic energy.
True
False
If a person kicks a soccer ball, then ___________________.
the ball will not move
the ball will not change direction
no energy is transferred to the ball
energy is transferred to the ball
Which of the following is an example of kinetic energy being converted to potential energy.
A car driving stops at a red light.
A pencil sits on a desk.
A water bottle is on a shelf.
A sneaker is on the ground.
Which of the following is an example of potential energy being converted into kinetic energy?
A student is at the top of a slide.
A roller coaster increases speed as it goes down a hill.
A plate sits on a table.
A bicycle is leaning against a wall.